For a revert to Islam, changing one’s legal name on official documents like a passport or Aadhaar card is not religiously obligatory in most cases. The clear exception is if the original name carries a shirk-based meaning — for example, directly referencing another deity or a title of worship-like reverence for someone other than Allah — in which case scholars agree the name should be changed. If the birth name is religiously neutral (many names, even from non-Muslim backgrounds, simply mean things like ‘joy,’ ‘light,’ or ‘strength’), the revert may choose to adopt and use an Islamic name personally and within their community, while the legal change on government documents remains entirely a practical, personal decision rather than a religious requirement.